[...] king [Darius] son of Hystaspes [...]
[...] did [...]
This is of course not a text full of very important information, but the fact that it exists is remarkable, because Gherla is in the northwestern part of modern Rumania.
Although this is the only Achaemenid royal inscription that was ever found in Europe, it is not entirely without parallels. The Greek researcher Herodotus of Halicarnassus tells us in his famous Histories that Darius, after conquering the eastern part of Thrace (in c.513), visited the source of a river and left the following inscription:
The first two thirds of this text do not resemble other Achaemenid inscriptions, but the last line and the location of the site remind one of Darius' inscription (DE, especially the last part) near the waters of Gandj Nameh. Although Herodotus renders the contents of the Persian inscription in Thrace erroneously, there are reports that the inscription itself was still visible until 1830.
The head-springs of the Tearos give the best and fairest water of all rivers; and to them came (leading an army against the Scythians) the best and fairest of all men, Darius, son of Hystaspes, of the Persians and of all the continent king.note[Herodotus, Histories 4.91]
Back to Gherla. Another question is how this tablet reached Rumania. It is unlikely (although not impossible) that the Persian armies ever crossed the Carpathian mountains. Probably, the tablet was originally placed somewhere in the satrapy of Thrace, and later taken, as booty, to the place where it was excavated.